 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.resources;

 import org.eclipse.core.internal.watson.IPathRequestor;
 import org.eclipse.core.resources.*;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.QualifiedName;

 /**
  * Implements a resource proxy given a path requestor and the resource
  * info of the resource currently being visited.
  */
 public class ResourceProxy implements IResourceProxy, ICoreConstants {
     protected final Workspace workspace = (Workspace) ResourcesPlugin.getWorkspace();
     protected IPathRequestor requestor;
     protected ResourceInfo info;

     //cached info
 protected IPath fullPath;
     protected IResource resource;

     /**
      * @see org.eclipse.core.resources.IResourceProxy#getModificationStamp()
      */
     public long getModificationStamp() {
         return info.getModificationStamp();
     }

     public String getName() {
         return requestor.requestName();
     }

     public Object getSessionProperty(QualifiedName key) {
         return info.getSessionProperty(key);
     }

     public int getType() {
         return info.getType();
     }

     /**
      * @see org.eclipse.core.resources.IResourceProxy#isAccessible()
      */
     public boolean isAccessible() {
         int flags = info.getFlags();
         if (info.getType() == IResource.PROJECT)
             return flags != NULL_FLAG && ResourceInfo.isSet(flags, M_OPEN);
         return flags != NULL_FLAG;
     }

     /**
      * @see org.eclipse.core.resources.IResourceProxy#isDerived()
      */
     public boolean isDerived() {
         int flags = info.getFlags();
         return flags != NULL_FLAG && ResourceInfo.isSet(flags, M_DERIVED);
     }

     /**
      * @see org.eclipse.core.resources.IResourceProxy#isLinked()
      */
     public boolean isLinked() {
         int flags = info.getFlags();
         return flags != NULL_FLAG && ResourceInfo.isSet(flags, M_LINK);
     }

     /**
      * @see org.eclipse.core.resources.IResourceProxy#isPhantom()
      */
     public boolean isPhantom() {
         int flags = info.getFlags();
         return flags != NULL_FLAG && ResourceInfo.isSet(flags, M_PHANTOM);
     }

     /**
      * @see org.eclipse.core.resources.IResourceProxy#isTeamPrivateMember()
      */
     public boolean isTeamPrivateMember() {
         int flags = info.getFlags();
         return flags != NULL_FLAG && ResourceInfo.isSet(flags, M_TEAM_PRIVATE_MEMBER);
     }

     /**
      * @see org.eclipse.core.resources.IResourceProxy#requestFullPath()
      */
     public IPath requestFullPath() {
         if (fullPath == null)
             fullPath = requestor.requestPath();
         return fullPath;
     }

     /**
      * @see org.eclipse.core.resources.IResourceProxy#requestResource()
      */
     public IResource requestResource() {
         if (resource == null)
             resource = workspace.newResource(requestFullPath(), info.getType());
         return resource;
     }

     protected void reset() {
         fullPath = null;
         resource = null;
     }
 }

